Yamaha YZF-R125 Service Manual: Disassembling the front fork legs
The following procedure applies to both of the front fork legs.
1. Remove:
- Rubber cap
- Clip "1"
- Front fork cap "2" (with O-ring)
- Fork spring
NOTE:
Push the front fork cap in the direction of the arrow shown in the illustration to remove the clip.
2. Drain:
- Fork oil
NOTE:
Stroke the inner tube several times while draining the fork oil.
3. Remove:
- Dust seal "1"
- Oil seal clip "2" (with a flat-head screwdriver)
| CAUTION: Do not scratch the inner tube.
|
4. Remove:
- Damper rod bolt "1"
- Damper rod
NOTE:
While holding the damper rod with the damper
rod holder "2" and T-handle "3", loosen the
damper rod bolt. 
Removing the front fork legs
The following procedure applies to both of the
front fork legs.
1. Stand the vehicle on a level surface.
WARNINGSecurely support the vehicle so that there
is
no danger of ...
Checking the front fork legs
The following procedure applies to both of the
front fork legs.
1. Check:
Inner tube
Outer tube
Bends/damage/scratches
Replace.
WARNINGDo not attempt to straighten a bent inner ...
Other materials:
Checking the transmission
1. Measure:
Main axle runout
(with a centering device and dial gauge "1")
Out of specification Replace
the main axle.
2. Measure:
Drive axle runout
(with a centering device and dial gauge "1")
Out of specification Replace
the drive axle.
3. Check:
Transmiss ...
General chassis
Installing the air filter case
1. Install:
Air filter case joint clamp
NOTE:
Align the projection "a" on the air filter case with
the slot "b" in the air filter case joint clamp.
...
Intake air pressure sensor
1. Check:
Intake air pressure sensor output voltage
Out of specification Replace the throttle
body.
a. Connect the pocket tester (DC 20 V) to the
throttle body sensor assembly coupler as
shown.
Positive tester probe
pink/white "1"
Negative tester probe
gray/black "2"
...